/*
 * Copyright 2012 Sergey Netesanyi.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.versatile.gwt.serialization.client.util;

import java.util.ArrayList;
import java.util.List;

/**
 * Collection utility class.
 *
 * @author Sergey Netesanyi
 * @version 1.0
 */
public final class CollectionUtil {

    private static final int DEFAULT_LIST_CAPACITY = 10;

    private CollectionUtil() {
    }

    public static <T> List<T> newArrayListIfNull(List<T> list, int capacity) {
        if (list == null) {
            return newArrayList(capacity);
        }
        return list;
    }

    public static <T> List<T> newArrayListIfNull(List<T> list) {
        if (list == null) {
            return newArrayList();
        }
        return list;
    }

    public static <T> List<T> newArrayList(int capacity) {
        return new ArrayList<T>(capacity);
    }

    public static <T> List<T> newArrayList() {
        return newArrayList(DEFAULT_LIST_CAPACITY);
    }
}
